Salesman,
Not sure what kind of info you're looking for (and your profile wasn't particaularly helpful either!)
Anyway, our company uses the type of hood with it's own O2 generator, a neckseal and full head and upper-body protection.
We practice with the things regularly by having to put them on in a smoke filled environment and then having to extinguish a fire.
They're pretty claustrophobic, the breathing resistance can get fairly troublesome, but I'm happy we carry them on our planes. The smokehood improves our chances of fighting a fire effectively and that's worth any small incovenience.
Hope this is of use.
JL